Fan Casting Brainiac in World of Krypton (HBO Limited Series)

Artificial intelligence that originally developed on Culon where it believed that the only way to preserve the universe was to save the best of civilizations by micronizing them and then leaving. The Collector would infect various worlds that had a high level of AI systems with its presence before taking the main cities of those worlds. It grew on Krypton after being advanced by Jor-El eventually attacking Krypton destabilized the planet's core